NAME

reboot, halt, poweroff - reboot or stop the system

SYNOPSIS

reboot [OPTION]...
halt [OPTION]...
poweroff [OPTION]...

DESCRIPTION

These programs allow a system administrator to reboot, halt or poweroff
the system.
When called with --force or when in runlevel 0 or 6, this tool invokes
the reboot(2) system call itself and directly reboots the system.
Otherwise this simply invokes the shutdown(8) tool with the appropriate
arguments.
Before invoking reboot(2), a shutdown time record is first written to
/var/log/wtmp

OPTIONS

-f, --force
Does not invoke shutdown(8) and instead performs the actual
action you would expect from the name.
-p, --poweroff
Instructs the halt command to instead behave as poweroff.
-w, --wtmp-only
Does not call shutdown(8) or the reboot(2) system call and
instead only writes the shutdown record to /var/log/wtmp--verbose
Outputs slightly more verbose messages when rebooting, useful
for debugging problems with shutdown.

ENVIRONMENT

RUNLEVELreboot will read the current runlevel from this environment
variable if set in preference to reading from /var/run/utmp

FILES

/var/run/utmp
Where the current runlevel will be read from; this file will
also be updated with the runlevel record being replaced by a
shutdown time record.
/var/log/wtmp
A new runlevel record for the shutdown time will be appended to
this file.